Suzhou Electric Appliance Research Institute
期刊號: CN32-1800/TM| ISSN1007-3175

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基于微觀形貌的電纜腐蝕現(xiàn)象研究

來源:電工電氣發(fā)布時間:2018-06-15 14:15 瀏覽次數(shù):699
基于微觀形貌的電纜腐蝕現(xiàn)象研究
 
何春光,賀賢華
(國網(wǎng)浙江省電力公司寧波供電公司,浙江 寧波 315200)
 
    摘 要:對沿?;@區(qū)中運(yùn)行十年的電力電纜進(jìn)行腐蝕情況的觀測與分析,采用掃描電子顯微鏡觀測腐蝕部位的微觀形貌,并進(jìn)行元素分析。測試結(jié)果顯示:電纜的鎧裝層發(fā)生了嚴(yán)重腐蝕,尤其是在鋼帶交疊處;銅屏蔽層處腐蝕明顯,微觀形貌粗糙有腐蝕產(chǎn)物附著,并且含有氧、氯、硅、鐵、硫等元素。研究結(jié)果表明,在長年運(yùn)行過程中,即使外護(hù)套沒有破損,電纜內(nèi)部也會發(fā)生腐蝕,仍需加強(qiáng)對電纜外護(hù)套的巡視和監(jiān)測,并在制作中間接頭等時觀察腐蝕情況,及早發(fā)現(xiàn)腐蝕問題,對電纜進(jìn)行修復(fù)或者更換,避免造成嚴(yán)重后果。
    關(guān)鍵詞:電力電纜;堿性環(huán)境;微觀形貌;腐蝕
    中圖分類號:TM726.4     文獻(xiàn)標(biāo)識碼:A     文章編號:1007-3175(2018)06-0050-04
 
Research on Cables Corrosion Phenomena Based on Micro Morphology
 
HE Chun-guang, HE Xian-hua
(State Grid Zhejiang Province Ningbo Power Supply Company, Ningbo 315200, China)
 
    Abstract: Observation and analysis of corrosion condition were made to the power cable operating in a coastal chemical industrial park for ten years. This paper adopted a scanning electron microscope to observe the micro morphology of corrosion parts and carried out elemental analysis. The test results showed that there was serious corrosion of steel armor, especially in the overlapping part. Corrosion was also obvious at the copper shield. The microstructure was rough with corrosion products adhered to it, which consisted of oxygen, chlorine, silicon, iron, sulfur and other elements. The research results show that even if the insulating sheath has a waterproof effect on the cable, the corrosion is unavoidable due to the operation for all the year round, so that it is necessary to strengthen the inspection and monitoring of the outer sheath of the cable to find out the defects early so as to carry out cables repairing and replacement, avoiding further aggravating the corrosion.
    Key words: power cable; alkaline environment; micro morphology; corrosion
 
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